src/api/subtitle_lang_next.c

   1 /* libquvi
   2  * Copyright (C) 2013  Toni Gundogdu <legatvs@gmail.com>
   3  *
   4  * This file is part of libquvi <http://quvi.sourceforge.net/>.
   5  *
   6  * This library is free software: you can redistribute it and/or
   7  * modify it under the terms of the GNU Affero General Public
   8  * License as published by the Free Software Foundation, either
   9  * version 3 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU Affero General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Affero General
  17  * Public License along with this library.  If not, see
  18  * <http://www.gnu.org/licenses/>.
  19  */
  20
  21 /** @file subtitle_lang_next.c */
  22
  23 #include "config.h"
  24
  25 #include <glib.h>
  26
  27 #include "quvi.h"
  28 /* -- */
  29 #include "_quvi_s.h"
  30 #include "_quvi_subtitle_s.h"
  31
  32 /** @brief Traverse to next available language @ref sub_type
  33 @return NULL if none was found
  34 @sa @ref parse_subtitle
  35 @ingroup @ref subprop
  36 */
  37 const quvi_subtitle_lang_t quvi_subtitle_lang_next(quvi_subtitle_type_t handle)
  38 {
  39   _quvi_subtitle_type_t qst = (_quvi_subtitle_type_t) handle;
  40
  41   /* If G_DISABLE_CHECKS is defined then the check is not performed. */
  42   g_return_val_if_fail(handle != NULL, QUVI_FALSE);
  43
  44   qst->curr.language = (qst->curr.language != NULL)
  45                        ? g_slist_next(qst->curr.language)
  46                        : qst->languages;
  47
  48   return ((qst->curr.language != NULL)
  49           ? qst->curr.language->data
  50           : NULL);
  51 }
  52
  53 /* vim: set ts=2 sw=2 tw=72 expandtab: */
  54